Three-Phase Remanent Undervoltage Supervision Msvpr - ABB RELION REX640 Technical Manual

1MRS759142 C
6.8
6.8.1
6.8.2
6.8.3
6.8.4
REX640
Technical Manual
Three-phase remanent undervoltage supervision
MSVPR
Identification
Function description
Three-phase remanent undervoltage
supervision
Function block
GUID-16AB2A83-1C2E-4968-8460-0824F5102880 V1 EN
Figure 675: Function block
Functionality
The three-phase remanent undervoltage supervision function MSVPR is used to
supervise the remanent voltage of the motor. The rotor with high inertia load may
continue to rotate after the primary supply voltage is switched off. Re-energizing the
motor immediately can result in catastrophic failure.
MSVPR gives permissive output when the remanent voltage of the motor reaches a
safe level to re-energize. Supervision can be selected for one-phase or for three-phase
operation. MSVPR can also adapt to a frequency range of 10...70 Hz.
The function contains a blocking functionality. It is possible to block the function
output, timer or the function itself.
Analog channel configuration
MSVPR has one analog group input which must be properly configured.
Table 1177: Analog inputs
Input
U3P
See the preprocessing function blocks in this document for the
possible signal sources.
Supervision functions
IEC 61850 IEC 60617
identification identification
MSVPR 3U<R
Description
Three-phase voltages
Section 6
ANSI/IEEE C37.2
device number
27R
1241